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I would like to ask what exactly is the difference between the priority settings of network adapters in the advanced settings window of the adapter settings (adapters and bindings, like mentioned in here: How can I force Windows 7 to give my LAN (wired) conection priority over my WiFi?) and changing the metrics in the routing table. So in order to change priority of an interface, I can move it up and down in the advanced settings window, but I could also modify the metrics in the routing table. What exactly is the difference and which one has a higher priority when they conflict with each other? I have read and searched a lot, but I can not find a place that gives me a clear answer, so I hope someone in here knows the right answer.
Edit2: To this question (How to give preference over one network connection over another?), there is an answer mentioning the following:
"Now important thing - changing adapter priority via adapter setting does not change metric. This means it will not change routing decisions!"
But then, what does the setting do and how can I know which route/interface the traffic will follow?
Thanks a lot in advance, Niels
Actually, I ment another advanced settings window, the one that is mentioned in here: http://superuser.com/questions/321324/how-to-give-network-choice-priority-to-lan-other-than-wifi-in-windows-7 There also is a comment about the difference, but it is not really clear to me...
– Niels – 2013-07-11T17:29:30.127oh ok. well, that box controls the order in which the routes are inspected, so that if you have two interfaces with a viable route to the same address, they are selected in the order you specify. keep in mind, most routing algorithms are entirely dynamic, so changing the route table isn't an option for many users. additionally many routing advertisement protocols don't consider the monetary cost of a link, so if you have a leased line and a free one, you can elect to have all traffic that can use the free interface do so. – Frank Thomas – 2013-07-11T19:44:53.633
per the technet article linked in your linked thread, it appears that the position of the adapter does weight the metric evaluation for the local route table, when not participating in a dynamic routing protocol like ospf or eigrp – Frank Thomas – 2013-07-11T20:17:39.023
So, then how can I know which route the traffic will follow based on the information of the interface order and the metrics? – Niels – 2013-07-12T14:50:09.367
the interface precedence weights the metric (lowers it), so that unless you are using an dynamic route algorithm, it will generally use the route with the highest precedence adapter simply because it has a better metric. – Frank Thomas – 2013-07-12T15:07:51.327
Well, I have tried it, but changing the order seems resulting not even in the smallest change in the metrics. Therefore, this whole story stays completely unclear to me. I fully understand the metrics, I only not understand what the priority order has to do with it and how it eventually influences the route of my traffic. Nevertheless I realy appreciate your effort of answering me, so thangs for that. – Niels – 2013-07-12T20:56:20.633